What makes Comp "R" lifters necessary?
What makes Comp "R" lifters necessary? What makes Comp "R" lifters necessary? Seat load, open load, or spring rate? At what point (numerically) do they become necessary? Thanks, Shawn
they are not necessary,i think they kind of suck. i have comp 850-16 i got from speed inc and they work great. hell...some board members have 550hp and still run stock lifters. i have near 500hp my self,so when i did the head swap i added new lifters for the hell of it.
Right, but with some springs they are necessary. Comp 977s come to mind. HP levels don't matter, spring pressure does, I'm just not sure at what point (numerically) they become available? What springs are you running?
Shawn
Shawn
HP level doesn't mean squat. I can spray a junk yard motor and make 800 hp, for a little while anyway, with some stock springs.
I would say it is your cam lobe, rpm, valve train weight and spring pressure.
In my case I guessed that the stock style lifters will not deal well with a 239 at .050" duration and .651" lift lobe and 6800 rpm.
I would say it is your cam lobe, rpm, valve train weight and spring pressure.
In my case I guessed that the stock style lifters will not deal well with a 239 at .050" duration and .651" lift lobe and 6800 rpm.
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It's a domino effect. Big and aggressive cam lobes need stiff springs. Stiff springs put more load on the lifter. Stock and stock-type lifters can't take the extra load, so you are forced to upgrade...that's where Comp-R lifters come in.
It might be interesting to see what pressures Morel lifters can tolerate. Would be nice not to have to fool w/ adjustable rockers or shimming the stockers.
It might be interesting to see what pressures Morel lifters can tolerate. Would be nice not to have to fool w/ adjustable rockers or shimming the stockers.
Originally Posted by Cstraub
The Morels in the marine market are getting 150 to 170# seat pressure and over the nose around 400 to 440#'s.
